Karlheinz Stockhausen
- Musica Classica Classical Music Dictionary entry with life, important works, and illustrations.
- http://www.karadar.it/Dictionary/stockhausen.html

Classical Music Archives: Stockhausen
- Biography from the Concise Oxford Dictionary of Music.
- http://www.classicalarchives.com/bios/codm/stockhausen.html

Stockhausen, Karlheinz (1928 - Living), Germany
- Biographical data, recommended CDs, books and sheet music, bibliography, and links to biographical essays from Dr. Estrella's Incredibly Abridged Dictionary of Composers.
- http://stevenestrella.com/composers/composerfiles/stockhausenliving.html

Karlheinz Stockhausen's New Morphology of Musical Time
- Paper by Christopher K. Koenigsberg.
- http://www.music.princeton.edu/~ckk/smmt/index.html